Existing research focuses on how digital governance promotes the optimization of bureaucratic organizations, without focusing on their organizational ecology. This article takes A city in M province as an example to present the organizational ecology of digital governance. Compared to bureaucratic organizations, digital governance achieves abstraction and simplification of complex public needs through the control of entrances and interfaces, thereby promoting flexible division of labor among departments around issues and needs through data and algorithms, thereby achieving the flexibility of government bureaucratic organizations in the new social institutional environment. Under these conditions, digital governance and bureaucratic organizations are nested to form a composite architecture, which combines the flexibility of digital governance and the professionalism of bureaucratic governance, promoting the optimal efficiency of the national governance system. But there is also tension between the two organizational logics: at the bureaucratic level, departmental integration may lead to data being unable to flow according to demand and being fragmented within the organization; On the one hand, the dilemma of power and responsibility in digital governance requires subordinates to seek help from higher-level departments. The creation of innovative performance in digital governance has also strengthened the governance load at the grassroots level, and the above tension has shrunk the flexibility space shaped by digital governance. The conclusion points out that the comprehensive institutional design around the digital platform system and data asset attributes is an important institutional choice to break through the dilemma of digital governance.

"> digital governance, bureaucratic organization, Organizational , Ecology, flexibility, institutional environment